Backing for artificial teeth.



A. l. ASCH.

BACKING'FOR'AHTEFICIAL TEETH.

APPLICATION men am. lo. 1915.

Patented May 25,1915.

IN1/mmf? 1 Andrew/J Aach mamm- CIT rmt imno-*ww @ma aan il iiiiriail noli.. le i O BACNG: FR ARTIFICIAL TEETH.

matassa Application filed liarch i0, 1915.

T0 all whom 'it may! concern:

Be it known that l, inninnv J. risen, a citizen ot the United States, and a resident ot' the city of New York? borough of Manhattan, in the county and State oi blew York7 have invented a new and limproved Backing for Artificial Teeth, of which the following is a full, clear, and exact description.

This invention relates to bridge, crown and plate work in dentistry and has to deal more particularly withan backing for the facing of a tooth;

The invention has for its general objects to provide a novel, simple and ei'ective ineans *for interchangeably and replaceably mounting the facing of a tooth on a base or body of the bridge, crown or plate by the use of a bac-king' so designed that it will be permanently secured in place, and to which the facing of the tooth is fastened.

further object of theV invention is the provision of a novel forni of backing especially designed tor use in connection with artiiicial porcelain teethl known as acings, othat type having two rearwardly e;\;tendingspa-ced pins, and the. backing is provided with a pair of sockets into which the pins extend and are each securely fastened by a soft cement so that in case of the lacing breaking oil, due to wear 'or any other cause, it is merely necessary to pullv out the pins that roniain in the backing and apply a sobstitute lacing7 the advantage being that it is unnecessary 'to einove'the bridge if the saine be of the perinaiwnt kinth and also being that the invention inakcs use of a tooth 'facing which is oi standard forni and a :staple article of the trade. Ui coarse the backing` can be inade with a single socket for use with a facing having only a single pin, but in this case the socket and pin will be of non-circular crosssection to assist in preouting' the fac-iin;- from pivoting on the pin.

,".ccording` to coininon practice, the hackingz's used are provided with openings which receive the pins on the facing, and these pins are beni.. bark against the back lace of the backing'. '.llnis, when the body olf. the brown. bridge or plate is soldered to the backing. the pins are soldered also, so that the pins cannot be polled out. il' the lacing;A breaks olhas they can with this invon'ziou.

Specification of Letters Patent.

For thisreason the repair work, according'A to the old practico. is tedious7 cxponrive and diliicnlt.

latentod ay 25, $15.)

Serial No. 13,888.

1With such objects in view, and others which will appear as the description proceeds? the invention comprises various novel 'features ot construction and arrangement ot parts which will be set forth with particularity in the` following description and claims appended hereto.

ln Ythe accompanying.; drawing, which illustrates one embodiment otl the invention and wherein similar characters of reference indicate corresponding parts in all the views, Figure l is a front view o'l a bridge with two teeth coinileted, and a backing ready to receire facings; Fig. 2 is ay sectional view on thel line Fig. l; Fig. i is a perspective view ot a portion of the bridge with a backing applied; Fig'. l is a rear perspective view of a tooth facing; Fig. is a rear perspective view ot a backing or tooth facing; and Fig. 6 is a perspective view showing ,a facing and backing of the single pin type,

in the rpresent instancefthe invention is shown in connection with bridgework, but it is not necessarily limited to this application.

Referring to the drawing, A designates the body et a bridge which is provided with the usual securing pios l, and carried by the 'bridge body A are the artificial teeth B in the vtorna 'of porcelain facings which are ont' usual construction and embody two parallelA and `spaced rearwardly extending pins 2 suitably embedded in the tooth facings. lil-ach facing is provided with a backing C which is a plate of metal or equivalent material shaped to .tit the rear surface of the iacing', and this plate or backing C has a pair olE spaced parallel sockets 3 which perfor-1n the double functionv oi forming means for athiching` the backi C' to the body of the bridge and tor ,receiving and holding the pins Q of. the tooth VFacing. lhese sockets are shown as cylindrical and having their back portions closed. rThe body of the bridge is inade in the usual manner. The

)ins 2 oi the facino are anchored in the sockets 'l by means il sol't cement l which serves to rigidly secure the hiring to the backing 'ilf'hein however,l the facing breaks oli' by being worin the backing rcinains in .sit-u, and it lisA incrclv necessary to pull out the pins 2, and aller sci-apinc' out any adhering cement lfroin thc sockets l, a new tooth tace applied.` rising soi't cement as a nicans for anchoring the pins of the new lill tooth facing in the sockets 3. It will thus be seen that the tooth facings C ari'be easily, quickly and inexpensively replaced` Without the necessity of removing the" Bridge or crown body. The invention does not necessitate the manufacture of a new form of tooth 'facing and the backing is a new artif cle ot manufacture of itself, and wili be sold inA connection with the facings.

When a single pin type o',tooth is used, the backing C', Fig. 6, has a non-circular socket 3 to receive a correspondingly shaped pin 2 on the lfacing B', so that rotative strain on -the tooth will be resisted.

. From the foregoing description taken in connection with the accompanying drawing, the advantages of the 'construction and method of operation will be readily understood by those skilled in the art to which present form of tooth lthe invention appertains, and'whifle I have described the principle of operation, to-

gether with the device which I Ynow consider" to be the best embodiment thereof, I desire to have it understood vthat the device shown is merely illustrative and that such changes 'claim as new and desire to secure ing a plate adapted to t the back of a fao-A ing and having a plurality of sockets integrally connected therewith and extending from the rearface of the backing, and the front ends of the sockets being open and the rear ends closed, and the sockets being spaced apart.

In testimony whereof I havesigned my name to this specification in the presence of two subscribing Witnesses.

, ANDREW J ASCII. Witnesses JOHN J. WARD, WILLIAM KAUFMAN. 

